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Renesas RD7.5S-T1-A
- Part No.:
- RD7.5S-T1-A
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
RD7.5S-T1-A.pdf
- Description:
- DIODE ZENER 2-SUPER MINI MOLD
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
RD7.5S-T1-A from Renesas Electronics is a 200 mW surface-mount zener diode in Super Mini Mold (SMD) package, rated for 7.03 V to 7.87 V nominal zener voltage at 5 mA test current, with dynamic impedance ≤30 Ω and reverse leakage ≤2 μA at 4.0 V, used for precision voltage regulation and surge suppression in low-power analog circuits.
For engineers reviewing the RD7.5S-T1-A datasheet, RD7.5S-T1-A pinout, RD7.5S-T1-A application, or RD7.5S-T1-A equivalent, this part serves as a compact, stable reference element in power supply feedback paths, overvoltage clamping networks, and waveform shaping circuits where tight voltage tolerance and low dynamic impedance are required.
Technical Context
This zener diode operates in reverse breakdown mode with sharp knee characteristics, optimized for constant-voltage regulation at IZ = 5 mA. Its E24-standardized zener voltage range (7.03–7.87 V) ensures compatibility with common 5 V and 8 V system rails.
Thermal performance is defined by a junction-to-ambient thermal resistance of 625°C/W on a standard 30 mm × 30 mm × 1.6 mm glass-epoxy PCB, and it supports non-repetitive surge reverse power up to 85 W for 10 μs pulses - critical for transient voltage suppression.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.03 V min to 7.87 V max at IZ = 5 mA - defines stable regulation window for 7.5 V nominal reference applications. |
| Dynamic Impedance (ZZ) | ≤30 Ω at IZ = 5 mA - ensures minimal output voltage variation under load current changes. |
| Reverse Leakage Current (IR) | ≤2 μA at VR = 4.0 V - guarantees low quiescent power loss in standby or high-impedance bias networks. |
| Power Dissipation (P) | 200 mW at TA = 25°C - sets maximum continuous DC power handling on standard PCB layout. |
| Junction Temperature (Tj) | −55°C to +150°C - enables operation in industrial ambient environments without derating below −40°C. |
| Surge Reverse Power (PRSM) | 85 W at t = 10 μs (1 pulse) - provides robust transient immunity against ESD and inductive kickback events. |
Pinout & Package
RD7.5S-T1-A uses a 2-pin Super Mini Mold (SMD) package with cathode indicated by a band. Dimensions: 2.5 ±0.15 mm length × 1.25 ±0.1 mm width × 0.9 ±0.1 mm height. Cathode terminal is electrically negative in reverse-bias operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reverse-bias reference node | Connected to lower-potential side in zener regulation; forms return path for IZ current. |
| Cathode | Zener breakdown terminal / Voltage reference output | Provides stable regulated voltage referenced to anode; marked with band for polarity identification. |
Key Features
| Feature | Design Value |
|---|---|
| Sharp breakdown characteristic | Enables precise voltage clamping with minimal knee voltage spread - critical for accurate threshold detection. |
| E24-standardized zener voltage | Ensures interchangeability across design revisions and supplier alternatives within the same voltage bin (B-class). |
| Low dynamic impedance (≤30 Ω) | Maintains regulation stability under varying load conditions - reduces need for additional filtering capacitance. |
| 200 mW power rating in SMD package | Supports space-constrained designs without compromising thermal margin on standard FR-4 PCBs. |
Applications
| Power Supply Feedback | Overvoltage Clamp |
|---|---|
Use Scenario: Regulating output voltage in linear regulators or switching converter feedback loops. IC Role / Device Role / Timing Role: Provides stable 7.5 V reference for error amplifier comparison. Use Value: Tight VZ tolerance (±6%) and low ZZ minimize output drift across temperature and load. |
Use Scenario: Protecting microcontroller I/O pins from transient overvoltage events. IC Role / Device Role / Timing Role: Shunts excess energy to ground when input exceeds 7.87 V. Use Value: 85 W surge capability handles 10 μs ESD pulses without degradation. |
| Waveform Clipper | Reference Bias Generator |
Use Scenario: Limiting AC signal amplitude in audio preamplifier stages. IC Role / Device Role / Timing Role: Clamps positive peaks at ~7.5 V while passing negative half-cycles. Use Value: Sharp breakdown ensures clean clipping edge with minimal distortion near threshold. |
Use Scenario: Generating stable bias voltages for op-amp input stages in sensor interfaces. IC Role / Device Role / Timing Role: Supplies low-noise, temperature-stable reference to high-impedance nodes. Use Value: ≤2 μA leakage preserves bias accuracy in nanoamp-level current-sensitive circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5233BS | Zener voltage 7.5 V ±5%, PD = 225 mW, ZZ = 30 Ω at 20 mA - higher test current shifts operating point. | Higher IZ rating suits higher-current regulation but increases quiescent loss in low-power designs. | Select when needing tighter VZ tolerance and higher surge margin; verify thermal layout for 225 mW dissipation. |
| Vishay NZX7V5B | Zener voltage 7.5 V ±5%, PD = 500 mW in DO-35 - through-hole, larger footprint, higher power headroom. | Not suitable for space-constrained SMD layouts; better for prototyping or high-reliability through-hole assemblies. | Choose for manual assembly, legacy board compatibility, or applications requiring >200 mW continuous dissipation. |
Compared with RD7.5S-T1-A, MMBZ5233BS offers tighter voltage tolerance but requires higher bias current, while NZX7V5B provides greater power margin at the cost of SMD compatibility - making RD7.5S-T1-A optimal for miniaturized, low-quiescent industrial control circuits.
Availability
RD7.5S-T1-A is available at Aetrix Electronics and suitable for power supply feedback, overvoltage protection, and precision reference biasing requiring stable component supply across industrial automation, sensor interface modules, and embedded controller peripherals.
Supply support for RD7.5S-T1-A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics Corporation is a Japanese semiconductor manufacturer formed in 2010 via merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power devices for industrial and automotive systems.
RD7.5S-T1-A belongs to the RD2.0S–RD150S zener diode family designed for compact, reliable voltage regulation and transient suppression in consumer, office, and industrial electronics - aligned with Renesas' "Standard" quality grade.
FAQ
What is the exact zener voltage range for RD7.5S-T1-A at 5 mA test current?
The RD7.5S-T1-A has a guaranteed zener voltage range of 7.03 V minimum to 7.87 V maximum when tested at IZ = 5 mA and TA = 25°C. This range corresponds to Class B specification per the Renesas D11444EJ6V0DS datasheet, and includes sub-classes B1 (7.03–7.39 V), B2 (7.25–7.63 V), and B3 (7.49–7.87 V). The RD7.5S-T1-A part number itself denotes the full B-class tolerance band.
Does RD7.5S-T1-A have a specified temperature coefficient, and how does it affect regulation accuracy?
Yes, RD7.5S-T1-A exhibits a positive temperature coefficient typical of zeners in the 7–8 V range, approximately +0.04 %/°C (or +3.0 mV/°C) based on Renesas' Fig.9. This means its zener voltage increases ~3 mV per °C rise in junction temperature - a factor that must be accounted for in high-precision references or wide-temperature-range applications. For stable operation, keep power dissipation low to limit self-heating.
Can RD7.5S-T1-A be used in place of a 7.5 V through-hole zener like 1N4734A?
RD7.5S-T1-A is not a direct drop-in replacement for 1N4734A due to differences in package, power rating (200 mW vs. 1 W), and test current (5 mA vs. 20 mA). While both target ~7.5 V regulation, RD7.5S-T1-A's lower ZZ at 5 mA and tighter thermal profile suit SMD designs, whereas 1N4734A handles higher continuous power. Substitution requires verifying layout, bias current, and thermal design for RD7.5S-T1-A.
What is the maximum allowable reverse surge power for RD7.5S-T1-A, and under what conditions?
RD7.5S-T1-A supports a non-repetitive surge reverse power of 85 W for a single 10 μs pulse, as specified in the Absolute Maximum Ratings table. This rating assumes ideal pulse conditions (no repetition, adequate cooling between events) and is validated per Figure 12 of the datasheet. Exceeding this limit risks irreversible junction damage, even if average power remains within 200 mW.
Is RD7.5S-T1-A compliant with RoHS and lead-free soldering requirements?
Yes, RD7.5S-T1-A meets EU RoHS Directive requirements for restricted substances, as confirmed by Renesas Electronics' environmental compliance documentation. It is compatible with lead-free reflow soldering profiles (peak temperature ≤260°C), and its Super Mini Mold package is rated for standard Pb-free assembly processes without delamination or parametric shift.
RD7.5S-T1-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-Super Mini Mold
RD7.5S-T1-A FAQ
1.How can I place an order for RD7.5S-T1-A through Aetrix?
Please submit a Request for Quotation (RFQ) for RD7.5S-T1-A on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for RD7.5S-T1-A reliable?
The price and inventory of RD7.5S-T1-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD7.5S-T1-A is usually 5 days.
3.What payment methods are accepted for RD7.5S-T1-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD7.5S-T1-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD7.5S-T1-A?
RD7.5S-T1-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD7.5S-T1-A order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for RD7.5S-T1-A?
For technical support, including RD7.5S-T1-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD7.5S-T1-A requirements.
6.How does Aetrix verify that RD7.5S-T1-A is sourced from the original manufacturer or authorized distributors?
All RD7.5S-T1-A products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that RD7.5S-T1-A meets industry standards.
7.What is the process for return or replacement of RD7.5S-T1-A?
All RD7.5S-T1-A units undergo pre-shipment inspection (PSI). If there is an issue with RD7.5S-T1-A, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The RD7.5S-T1-A part is unused and in its original packaging.
Return procedure for RD7.5S-T1-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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